CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Paid-in capital Cumulative Effect, Period of Adoption, Adjustment	Paid-in capital Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury stock	Accumulated other comprehensive income (loss)	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance
Balance, beginning of period at Dec. 31, 2020		$ 371,353	$ 1,862,042	$ (68,289)	$ 1,793,753	$ (393,326)	$ 216,821	$ 2,642,096	$ 68,289	$ 2,710,385
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(15,956)			8,879
Equity compensation			12,077
Repurchase of common stock						(150,000)
Other comprehensive income (loss), net of tax	$ (69,176)						(69,176)
Net income	461,049							461,049
Cash dividends								(68,439)
Balance, end of period at Sep. 30, 2021	$ 4,877,420	371,353	1,789,874			(534,447)	147,645	3,102,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]
Balance, beginning of period at Jun. 30, 2021		371,353	1,786,260			(384,550)	169,282	2,972,362
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(211)			103
Equity compensation			3,825
Repurchase of common stock						(150,000)
Other comprehensive income (loss), net of tax	$ (21,637)						(21,637)
Net income	157,977							157,977
Cash dividends								(27,344)
Balance, end of period at Sep. 30, 2021	4,877,420	371,353	1,789,874			(534,447)	147,645	3,102,995
Balance, beginning of period at Dec. 31, 2021	4,861,382	371,353	1,794,906			(675,265)	119,697	3,250,691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(20,537)			10,579
Equity compensation			17,674
Repurchase of common stock						(306,184)
Other comprehensive income (loss), net of tax	(615,222)						(615,222)
Net income	673,906							673,906
Cash dividends								(81,537)
Balance, end of period at Sep. 30, 2022	4,540,061	371,353	1,792,043			(970,870)	(495,525)	3,843,060
Balance, beginning of period at Jun. 30, 2022		371,353	1,791,380			(887,959)	(325,738)	3,623,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(2,670)			1,400
Equity compensation			3,333
Repurchase of common stock						(84,311)
Other comprehensive income (loss), net of tax	(169,787)						(169,787)
Net income	249,625							249,625
Cash dividends								(30,548)
Balance, end of period at Sep. 30, 2022	$ 4,540,061	$ 371,353	$ 1,792,043			$ (970,870)	$ (495,525)	$ 3,843,060